Gabriel Fleetline 85711 Heavy Duty Front/Rear Shock Absorber

In this review of the Gabriel Fleetline 85711 shock absorber the bottom line is clear: this is a purpose-built heavy duty replacement for Class 8 motor coaches and commercial fleet vehicles that prioritizes durability and ride control. Designed as an OEM-style replacement for front and rear applications on Motor Coach Industries E4500, G4500 and J4500 models and GMC Coaches 4100/4900, the 85711 is aimed at fleet operators and technicians needing a robust shock with specific valving for worn suspension. The single biggest reason to consider it is its heavy duty construction and application-tuned valving that improve ride quality under load.

Key Features

• Application fitment: Direct replacement fit for Motor Coach Industries E4500, G4500 and J4500 front axles and GMC Coaches 4100/4900, reducing installation time and fitment troubleshooting.
• Heavy duty construction: 360-degree arc-welded end mounts and chromed piston rods increase resistance to bending and corrosion for commercial use.
• Application specific valving: Tuned valving compensates for worn suspension and helps maintain consistent ride control under varying loads.
• Durable seals: Self-compensating piston seal design helps maintain performance and limit contamination in heavy duty environments.
• Service lengths: Concrete dimensions including a 24.54 in extended length, 15.26 in collapsed length and 9.27 in stroke simplify replacement planning.

Who It's For

The Gabriel Fleetline 85711 is best for fleet owners, repair shops and operators of motor coaches, RVs and heavy commercial vehicles who need a robust, OEM-replacement shock tuned for Class 8 front axle applications. It fits specific Motor Coach Industries models and GMC coach platforms, so it suits technicians who value correct fit and heavy duty materials.

Those who should look elsewhere include owners of light passenger cars or trucks with different mounting codes, and buyers who need a long-term warranty-backed consumer replacement; some users report early leaks or failures in isolated cases, so warranty and local support availability should factor into the purchase decision.

Pros & Cons

Pros

• Built for heavy commercial use with arc-welded mounts and chromed rods for increased durability.
• Application-tuned valving delivers noticeably improved ride quality on rough roads and under load.
• Direct replacement fit for several Motor Coach Industries and GMC coach models simplifies installation.
• Detailed interchange list makes cross-referencing with OE numbers straightforward.

Cons

• There are customer reports of limited durability in some units, including leakage or failure within months, so occasional quality variability is possible.
• As a heavy duty commercial shock, it is not intended for light passenger vehicle applications.

Specifications

Our Verdict

The Gabriel Fleetline 85711 is a strong choice for fleet managers and repair shops needing a heavy duty, application-matched shock for Motor Coach Industries and GMC coach platforms. It offers solid ride control improvements and rugged construction at a reasonable value, though buyers should be aware of occasional durability complaints and confirm local warranty support for peace of mind.

Frequently Asked Questions

Will this shock fit my Motor Coach Industries E4500?
Yes, the 85711 is specified for 01-09 Motor Coach Industries E4500 front axle applications when matching the OEM numbers listed.

What are the mounting codes for installation?
The published upper mount code is S21 and the lower mount code is EB3; verify these against the vehicle before ordering.

Are these shocks suitable for non-commercial cars?
No, these are heavy duty commercial shocks engineered for Class 8 coaches and fleet vehicles and are not intended for typical passenger cars.